Xamarin.Android, Fix>Android.Views.InflateException: Binary XML file line #1: Binary XML file line #1: Error inflating class com.google.android.gms.ads.AdView

Xamarin.Android で AdMob の広告を表示させようと思ったら、以下のような大量のスタックトレースが出て異常終了してしまいました。

この問題の解決方法は単純で、Xamarin.GooglePlayServices.Ads のバージョンを、60.1142.1 から 70.1501.0-preview2 にバージョンアップすることで問題解消しました。

慣れてないとハマると思うので、メモとして残しておきます。

Android.Views.InflateException: Binary XML file line #1: Binary XML file line #1: Error inflating class com.google.android.gms.ads.AdView ---> Android.Views.InflateException: Binary XML file line #1: Error inflating class com.google.android.gms.ads.AdView ---> Java.Lang.Reflect.InvocationTargetException:  ---> Java.Lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/gms/R$styleable; ---> Java.Lang.ClassNotFoundException: Didn't find class "com.google.android.gms.R$styleable" on path: DexPathList[[zip file "/data/app/com.companyname.Xamarin_Android_AdMob-Vo0ea06lDhoddjE6C9rhCQ==/base.apk"],nativeLibraryDirectories=[/data/app/com.companyname.Xamarin_Android_AdMob-Vo0ea06lDhoddjE6C9rhCQ==/lib/arm64, /system/fake-libs64, /data/app/com.companyname.Xamarin_Android_AdMob-Vo0ea06lDhoddjE6C9rhCQ==/base.apk!/lib/arm64-v8a, /system/lib64, /system/vendor/lib64]]
  at java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.R$styleable" on path: DexPathList[[zip file "/data/app/com.companyname.Xamarin_Android_AdMob-Vo0ea06lDhoddjE6C9rhCQ==/base.apk"],nativeLibraryDirectories=[/data/app/com.companyname.Xamarin_Android_AdMob-Vo0ea06lDhoddjE6C9rhCQ==/lib/arm64, /system/fake-libs64, /data/app/com.companyname.Xamarin_Android_AdMob-Vo0ea06lDhoddjE6C9rhCQ==/base.apk!/lib/arm64-v8a, /system/lib64, /system/vendor/lib64]]
  at at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:93)
  at at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
  at at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
  at at com.google.android.gms.internal.zzix.<init>(Unknown Source:9)
  at at com.google.android.gms.internal.zzlb.<init>(Unknown Source:49)
  at at com.google.android.gms.internal.zzlb.<init>(Unknown Source:7)
  at at com.google.android.gms.internal.zzlb.<init>(Unknown Source:7)
  at at com.google.android.gms.ads.BaseAdView.<init>(Unknown Source:6)
  at at com.google.android.gms.ads.AdView.<init>(Unknown Source:1)
  at at java.lang.reflect.Constructor.newInstance0(Native Method)
  at at java.lang.reflect.Constructor.newInstance(Constructor.java:334)
  at at android.view.LayoutInflater.createView(LayoutInflater.java:647)
  at at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790)
  at at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
  at at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
  at at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
  at at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
  at at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
  at at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
  at at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:418)
  at at android.app.Activity.setContentView(Activity.java:2654)
  at at md590b51b04120f98b286fdabac728c8b6d.MainActivity.n_onCreate(Native Method)
  at at md590b51b04120f98b286fdabac728c8b6d.MainActivity.onCreate(MainActivity.java:29)
  at at android.app.Activity.performCreate(Activity.java:6975)
  at at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
  at at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2775)
  at at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2897)
  at at android.app.ActivityThread.-wrap11(Unknown Source:0)
  at at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1598)
  at at android.os.Handler.dispatchMessage(Handler.java:105)
  at at android.os.Looper.loop(Looper.java:251)
  at at android.app.ActivityThread.main(ActivityThread.java:6572)
  at at java.lang.reflect.Method.invoke(Native Method)
  at at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
  at at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
  --- End of inner exception stack trace ---
  at java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/gms/R$styleable;
  at at com.google.android.gms.internal.zzix.<init>(Unknown Source:9)
  at at com.google.android.gms.internal.zzlb.<init>(Unknown Source:49)
  at at com.google.android.gms.internal.zzlb.<init>(Unknown Source:7)
  at at com.google.android.gms.internal.zzlb.<init>(Unknown Source:7)
  at at com.google.android.gms.ads.BaseAdView.<init>(Unknown Source:6)
  at at com.google.android.gms.ads.AdView.<init>(Unknown Source:1)
  at at java.lang.reflect.Constructor.newInstance0(Native Method)
  at at java.lang.reflect.Constructor.newInstance(Constructor.java:334)
  at at android.view.LayoutInflater.createView(LayoutInflater.java:647)
  at at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790)
  at at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
  at at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
  at at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
  at at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
  at at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
  at at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
  at at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:418)
  at at android.app.Activity.setContentView(Activity.java:2654)
  at at md590b51b04120f98b286fdabac728c8b6d.MainActivity.n_onCreate(Native Method)
  at at md590b51b04120f98b286fdabac728c8b6d.MainActivity.onCreate(MainActivity.java:29)
  at at android.app.Activity.performCreate(Activity.java:6975)
  at at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
  at at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2775)
  at at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2897)
  at at android.app.ActivityThread.-wrap11(Unknown Source:0)
  at at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1598)
  at at android.os.Handler.dispatchMessage(Handler.java:105)
  at at android.os.Looper.loop(Looper.java:251)
  at at android.app.ActivityThread.main(ActivityThread.java:6572)
  at at java.lang.reflect.Method.invoke(Native Method)
  at at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
  at at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
  at Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.R$styleable" on path: DexPathList[[zip file "/data/app/com.companyname.Xamarin_Android_AdMob-Vo0ea06lDhoddjE6C9rhCQ==/base.apk"],nativeLibraryDirectories=[/data/app/com.companyname.Xamarin_Android_AdMob-Vo0ea06lDhoddjE6C9rhCQ==/lib/arm64, /system/fake-libs64, /data/app/com.companyname.Xamarin_Android_AdMob-Vo0ea06lDhoddjE6C9rhCQ==/base.apk!/lib/arm64-v8a, /system/lib64, /system/vendor/lib64]]
  at at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:93)
  at at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
  at at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
  at ... 32 more
  --- End of inner exception stack trace ---
  at java.lang.reflect.InvocationTargetException
  at at java.lang.reflect.Constructor.newInstance0(Native Method)
  at at java.lang.reflect.Constructor.newInstance(Constructor.java:334)
  at at android.view.LayoutInflater.createView(LayoutInflater.java:647)
  at at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790)
  at at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
  at at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
  at at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
  at at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
  at at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
  at at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
  at at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:418)
  at at android.app.Activity.setContentView(Activity.java:2654)
  at at md590b51b04120f98b286fdabac728c8b6d.MainActivity.n_onCreate(Native Method)
  at at md590b51b04120f98b286fdabac728c8b6d.MainActivity.onCreate(MainActivity.java:29)
  at at android.app.Activity.performCreate(Activity.java:6975)
  at at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
  at at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2775)
  at at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2897)
  at at android.app.ActivityThread.-wrap11(Unknown Source:0)
  at at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1598)
  at at android.os.Handler.dispatchMessage(Handler.java:105)
  at at android.os.Looper.loop(Looper.java:251)
  at at android.app.ActivityThread.main(ActivityThread.java:6572)
  at at java.lang.reflect.Method.invoke(Native Method)
  at at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
  at at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
  at Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/gms/R$styleable;
  at at com.google.android.gms.internal.zzix.<init>(Unknown Source:9)
  at at com.google.android.gms.internal.zzlb.<init>(Unknown Source:49)
  at at com.google.android.gms.internal.zzlb.<init>(Unknown Source:7)
  at at com.google.android.gms.internal.zzlb.<init>(Unknown Source:7)
  at at com.google.android.gms.ads.BaseAdView.<init>(Unknown Source:6)
  at at com.google.android.gms.ads.AdView.<init>(Unknown Source:1)
  at ... 26 more
  at Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.R$styleable" on path: DexPathList[[zip file "/data/app/com.companyname.Xamarin_Android_AdMob-Vo0ea06lDhoddjE6C9rhCQ==/base.apk"],nativeLibraryDirectories=[/data/app/com.companyname.Xamarin_Android_AdMob-Vo0ea06lDhoddjE6C9rhCQ==/lib/arm64, /system/fake-libs64, /data/app/com.companyname.Xamarin_Android_AdMob-Vo0ea06lDhoddjE6C9rhCQ==/base.apk!/lib/arm64-v8a, /system/lib64, /system/vendor/lib64]]
  at at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:93)
  at at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
  at at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
  at ... 32 more
  --- End of inner exception stack trace ---
  at android.view.InflateException: Binary XML file line #1: Error inflating class com.google.android.gms.ads.AdView
  at Caused by: java.lang.reflect.InvocationTargetException
  at at java.lang.reflect.Constructor.newInstance0(Native Method)
  at at java.lang.reflect.Constructor.newInstance(Constructor.java:334)
  at at android.view.LayoutInflater.createView(LayoutInflater.java:647)
  at at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790)
  at at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
  at at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
  at at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
  at at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
  at at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
  at at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
  at at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:418)
  at at android.app.Activity.setContentView(Activity.java:2654)
  at at md590b51b04120f98b286fdabac728c8b6d.MainActivity.n_onCreate(Native Method)
  at at md590b51b04120f98b286fdabac728c8b6d.MainActivity.onCreate(MainActivity.java:29)
  at at android.app.Activity.performCreate(Activity.java:6975)
  at at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
  at at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2775)
  at at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2897)
  at at android.app.ActivityThread.-wrap11(Unknown Source:0)
  at at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1598)
  at at android.os.Handler.dispatchMessage(Handler.java:105)
  at at android.os.Looper.loop(Looper.java:251)
  at at android.app.ActivityThread.main(ActivityThread.java:6572)
  at at java.lang.reflect.Method.invoke(Native Method)
  at at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
  at at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
  at Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/gms/R$styleable;
  at at com.google.android.gms.internal.zzix.<init>(Unknown Source:9)
  at at com.google.android.gms.internal.zzlb.<init>(Unknown Source:49)
  at at com.google.android.gms.internal.zzlb.<init>(Unknown Source:7)
  at at com.google.android.gms.internal.zzlb.<init>(Unknown Source:7)
  at at com.google.android.gms.ads.BaseAdView.<init>(Unknown Source:6)
  at at com.google.android.gms.ads.AdView.<init>(Unknown Source:1)
  at ... 26 more
  at Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.R$styleable" on path: DexPathList[[zip file "/data/app/com.companyname.Xamarin_Android_AdMob-Vo0ea06lDhoddjE6C9rhCQ==/base.apk"],nativeLibraryDirectories=[/data/app/com.companyname.Xamarin_Android_AdMob-Vo0ea06lDhoddjE6C9rhCQ==/lib/arm64, /system/fake-libs64, /data/app/com.companyname.Xamarin_Android_AdMob-Vo0ea06lDhoddjE6C9rhCQ==/base.apk!/lib/arm64-v8a, /system/lib64, /system/vendor/lib64]]
  at at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:93)
  at at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
  at at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
  at ... 32 more
  --- End of inner exception stack trace ---
  at android.view.InflateException: Binary XML file line #1: Binary XML file line #1: Error inflating class com.google.android.gms.ads.AdView
  at Caused by: android.view.InflateException: Binary XML file line #1: Error inflating class com.google.android.gms.ads.AdView
  at Caused by: java.lang.reflect.InvocationTargetException
  at at java.lang.reflect.Constructor.newInstance0(Native Method)
  at at java.lang.reflect.Constructor.newInstance(Constructor.java:334)
  at at android.view.LayoutInflater.createView(LayoutInflater.java:647)
  at at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:790)
  at at android.view.LayoutInflater.createViewFromTag(LayoutInflater.java:730)
  at at android.view.LayoutInflater.rInflate(LayoutInflater.java:863)
  at at android.view.LayoutInflater.rInflateChildren(LayoutInflater.java:824)
  at at android.view.LayoutInflater.inflate(LayoutInflater.java:515)
  at at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
  at at android.view.LayoutInflater.inflate(LayoutInflater.java:374)
  at at com.android.internal.policy.PhoneWindow.setContentView(PhoneWindow.java:418)
  at at android.app.Activity.setContentView(Activity.java:2654)
  at at md590b51b04120f98b286fdabac728c8b6d.MainActivity.n_onCreate(Native Method)
  at at md590b51b04120f98b286fdabac728c8b6d.MainActivity.onCreate(MainActivity.java:29)
  at at android.app.Activity.performCreate(Activity.java:6975)
  at at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1214)
  at at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2775)
  at at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2897)
  at at android.app.ActivityThread.-wrap11(Unknown Source:0)
  at at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1598)
  at at android.os.Handler.dispatchMessage(Handler.java:105)
  at at android.os.Looper.loop(Looper.java:251)
  at at android.app.ActivityThread.main(ActivityThread.java:6572)
  at at java.lang.reflect.Method.invoke(Native Method)
  at at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
  at at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
  at Caused by: java.lang.NoClassDefFoundError: Failed resolution of: Lcom/google/android/gms/R$styleable;
  at at com.google.android.gms.internal.zzix.<init>(Unknown Source:9)
  at at com.google.android.gms.internal.zzlb.<init>(Unknown Source:49)
  at at com.google.android.gms.internal.zzlb.<init>(Unknown Source:7)
  at at com.google.android.gms.internal.zzlb.<init>(Unknown Source:7)
  at at com.google.android.gms.ads.BaseAdView.<init>(Unknown Source:6)
  at at com.google.android.gms.ads.AdView.<init>(Unknown Source:1)
  at ... 26 more
  at Caused by: java.lang.ClassNotFoundException: Didn't find class "com.google.android.gms.R$styleable" on path: DexPathList[[zip file "/data/app/com.companyname.Xamarin_Android_AdMob-Vo0ea06lDhoddjE6C9rhCQ==/base.apk"],nativeLibraryDirectories=[/data/app/com.companyname.Xamarin_Android_AdMob-Vo0ea06lDhoddjE6C9rhCQ==/lib/arm64, /system/fake-libs64, /data/app/com.companyname.Xamarin_Android_AdMob-Vo0ea06lDhoddjE6C9rhCQ==/base.apk!/lib/arm64-v8a, /system/lib64, /system/vendor/lib64]]
  at at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:93)
  at at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
  at at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
  at ... 32 more